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Employee Retirement Benefit Plans (Details Textual) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Defined Contribution Plan Disclosure [Line Items] |  |  |
Maximum employee eligible contributions, percent | 100.00% |  |
US Based Employees |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Total contributions under plans | $ 12.1 | $ 11.3 | $ 12.8
Non US Based Employees |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Total contributions under plans | $ 4.8 | $ 4.1 | $ 4.5

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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
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- Details
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- Details
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